What does fault code ECM-U002187 mean?

Diagnostic fault code details for ECM-U002187 (Volvo S60 (2011–), Volvo S80 (2007–), Volvo S80 (2007–)). Repair service at OBD Tuning.

VOLVO

ECM-U002187 - Brake Pedal Switch Circuit. Bus Signal / Message Failures. Missing message

System

Engine Control Module (ECM)

Volvo models this fault code applies to

Applies to the following models:

3 models

S60 (2011–), S80 (2007–), V70 (2008–)

Show models by year and engine (9)

What does this fault code mean?

The code is set when the engine control module does not receive any message from the brake control module (BCM), that is when the communication between them stops. The cruise control then cannot be engaged.

Possible causes

Open circuit in the communication cable
Communication cable shorted to ground
Communication cable shorted to voltage
Contact resistance or oxidation in the connections
Open circuit in the connections
Short circuit in the connections

What you can do

1Read the code with a diagnostic tool and see whether it is active or only stored
2The brake system is safety critical, so have a workshop check the brake control module if the fault remains
3Gently pull on the connectors to the brake control module and the engine control module and see whether the code or the cruise control is affected
4Use a multimeter to check that the communication cable between the brake control module and the engine control module has no break and no contact with ground or voltage
5After the battery has been disconnected, press the brake pedal for a few seconds with the engine running so that cruise control comes back

Symptoms you may notice1

Cruise control does not engage

What the fault can affect1

Cruise control is disengaged for as long as the fault is active

General guidance for car owners. Diagnosis on the car can point to a different cause.